Methods and devices for a planar bidirectional optical coupler for wavelength division multiplexing are described. The optical coupler can be used in an optical transceiver housed within a compact optical interconnect module for optical fiber-based data communication and/or OTDR measurement. According to one aspect, the optical coupler includes a layered planar construction, each layer based on a transparent planar substrate. A bottom carrier layer includes a metallized surface for mounting of electronic and/or electro-optical components. A lens layer overlays the carrier layer and includes collimating transmit and/or focusing receive lenses. A beam splitter/combiner layer overlays the lens layer and includes angled coated lateral surfaces that provide beam splitting and wavelength filtering functionality. The beam splitter/combiner layer is optically coupled to a ferrule receptacle of a fiber connector of the optical transceiver. Alternatively, the beam splitter/combiner is optically coupled to a planar optical fiber connector via an additional lens guide layer.

Methods and devices for a planar bidirectional optical coupler for wavelength division multiplexing are described. The optical coupler can be used in an optical transceiver housed within a compact optical interconnect module for optical fiber-based data communication and/or OTDR measurement. According to one aspect, the optical coupler includes a layered planar construction, each layer based on a transparent planar substrate. A bottom carrier layer includes a metallized surface for mounting of electronic and/or electro-optical components. A lens layer overlays the carrier layer and includes collimating transmit and/or focusing receive lenses. A beam splitter/combiner layer overlays the lens layer and includes angled coated lateral surfaces that provide beam splitting and wavelength filtering functionality. The beam splitter/combiner layer is optically coupled to a ferrule receptacle of a fiber connector of the optical transceiver. Alternatively, the beam splitter/combiner is optically coupled to a planar optical fiber connector via an additional lens guide layer.

An object of the present invention is to provide a terminal determination device and a terminal determination method, which enable identification of a reflection signal from a terminal portion of an optical fiber to be measured even in a case where a reflection signal caused by multiple reflection appears in an OTDR waveform in a mode in which an OTDR and the optical fiber to be measured are connected at a bent portion.

The reflection signal caused by multiple reflection inevitably propagates through a distance equal to a distance between true reflection points more than the other reflection point, because of multiple reflection. Therefore, a distance between the reflection signal and another reflection signal is inevitably coincident with a distance between the other reflection signals. In contrast, in a case of a reflection signal from a terminal portion 51 of the optical fiber, the distance between the reflection signal and another reflection signal is not coincident with the distance between the other reflection signals.

An object of the present invention is to provide a terminal determination device and a terminal determination method, which enable identification of a reflection signal from a terminal portion of an optical fiber to be measured even in a case where a reflection signal caused by multiple reflection appears in an OTDR waveform in a mode in which an OTDR and the optical fiber to be measured are connected at a bent portion.

The reflection signal caused by multiple reflection inevitably propagates through a distance equal to a distance between true reflection points more than the other reflection point, because of multiple reflection. Therefore, a distance between the reflection signal and another reflection signal is inevitably coincident with a distance between the other reflection signals. In contrast, in a case of a reflection signal from a terminal portion 51 of the optical fiber, the distance between the reflection signal and another reflection signal is not coincident with the distance between the other reflection signals.

Systems and methods for logical to physical link mapping in a fiber optic network are provided. In one implementation, a method includes receiving geographic data related to one or more fiber links in a fiber optic network; receiving logical links on the one or more fiber links; receiving results from one or more tests performed on the one or more fiber links; utilizing the results to determine a physical representation of the one or more fiber links; and displaying a network map of the fiber optic network with the physical representation.

Systems and methods for logical to physical link mapping in a fiber optic network are provided. In one implementation, a method includes receiving geographic data related to one or more fiber links in a fiber optic network; receiving logical links on the one or more fiber links; receiving results from one or more tests performed on the one or more fiber links; utilizing the results to determine a physical representation of the one or more fiber links; and displaying a network map of the fiber optic network with the physical representation.

This application discloses a same-cable probability detection method. The method includes: obtaining a first characteristic parameter of a first optical signal and a second characteristic parameter of a second optical signal, where the first optical signal is a signal transmitted in a first optical fiber, the second optical signal is a signal transmitted in a second optical fiber, the first characteristic parameter is generated after the first optical signal is affected by a vibration of the first optical fiber, and the second characteristic parameter is generated after the second optical signal is affected by a vibration of the second optical fiber; and obtaining, based on the first characteristic parameter and the second characteristic parameter, a probability that at least one optical cable segment of the first optical fiber and at least one optical cable segment of the second optical fiber include a same-cable segment.

This application discloses a same-cable probability detection method. The method includes: obtaining a first characteristic parameter of a first optical signal and a second characteristic parameter of a second optical signal, where the first optical signal is a signal transmitted in a first optical fiber, the second optical signal is a signal transmitted in a second optical fiber, the first characteristic parameter is generated after the first optical signal is affected by a vibration of the first optical fiber, and the second characteristic parameter is generated after the second optical signal is affected by a vibration of the second optical fiber; and obtaining, based on the first characteristic parameter and the second characteristic parameter, a probability that at least one optical cable segment of the first optical fiber and at least one optical cable segment of the second optical fiber include a same-cable segment.

Methods and systems for monitoring an optical network are described. An optical device may receive a data signal. The optical device may send the data signal to a test port. A measuring device may measure characteristics associated with the data signal.

Methods and systems for monitoring an optical network are described. An optical device may receive a data signal. The optical device may send the data signal to a test port. A measuring device may measure characteristics associated with the data signal.